DOCTOR WHO IN DETAIL

The Doctor takes Rose into the far future; 5,000,000,000 years into the future to the day that Earth finally died. The Earth, now devoid of human life, had been managed by a trust, but due to funding problems, the trust finally let Earth die.

A space station is orbiting Earth, and a number of other people have gathered to watch the end, including Moxx of the Balhoon, the Face of Boe, Jabe of the trees, and Cassandra, the last human, who has had so much cosmetic surgery that all is left if a piece of skin that has to be continally moisturised.

Each species visitng the station brings gifts, including cuttings from a family relative, spit. One of the gifts, or which there are plenty, contains a small robotic spider; these spiders eventually escape and start affecting the stations systems.

People start dying due to the spiders. The Doctor, with Jabe's help, catches one of the spiders, and programs it to return to its master (or mistress); the spider returns to Cassandra.

Cassandra plans to blackmail various species for the return of people on the station to fund her lifestyle. She escapes before the stations shields fail, which the Doctor manages to prevent. The Doctor reverses Cassandra's teleportation beam, returning her to the station.

With no one to moisturise her, and with the temparature having risen substantially, the Doctor and everyone else watches as her skin dries out and tightens and finally her body explodes.